This is topic gearing for the quarter mile in forum Tech Talk at Northern California Ford Owners .
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Posted by Albert1 (Member # 558) on
:
I right now have 3.73. I want to get 26x10.5 mt et streets. In fourth gear what is the top speed at about 6000 rpms? I know my car is going to hit in the 120's and wondering if I should go with a bigger tire so I don't have to use fifth or drop the gear down? OR is it fine?
Albert
Posted by st5150 (Member # 51) on
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According to calculations 27.25 inch tires (how tall my 26 inch ET drags are with 3.73's in 4th gear at 6000 RPM is good for 130 mph. If they're a true 26 inches, then you're good until 124 mph.
A better fit would be 28 inch tires with 4.10's... good for a theoretical 122 mph @ 6K RPM, but you'll have a better launch.
Posted by shade-tree (Member # 298) on
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heh, 4.30s on a stocker w/ 28" tires
Posted by nitrous_bob (Member # 77) on
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you should be fine....i used 26" ET streets and got 112 MPH w/ 4.10's at about 5600